Buffer overflow in WebKitGTK+ and WPE WebKit - CVE-2025-43435

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Main Vulnerability Database Vulnerabilities #VU117960

Buffer overflow in WebKitGTK+ and WPE WebKit - CVE-2025-43435

Published: November 4, 2025


Vulnerability identifier: #VU117960
CSH Severity: Low
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-43435
CWE-ID: CWE-119
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary error in WebKit. A remote attacker can trick the victim into visiting a specially crafted website, trigger memory corruption and crash the browser.


Affected software

WebKitGTK+
WPE WebKit
visionOS
tvOS
Apple iOS
iPadOS
macOS
watchOS
Apple Safari

How to mitigate CVE-2025-43435

Install updates from vendor's website.

visionOS - update to 26.1
Apple Safari - update to 26.1
tvOS - update to 26.1 23J580
Apple iOS - addressed in versions 18.7.2 22H124, 26.1 23B85
iPadOS - addressed in versions 18.7.2 22H124, 26.1 23B85
macOS - update to 26.1 25B78
watchOS - update to 26.1 23S37

External References

Related Security Bulletins